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Author Topic: Loud whoosh/Air escaping under load.  (Read 5846 times)

Offline egg

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Loud whoosh/Air escaping under load.
« on: September 16, 2016, 03:05:13 PM »
 :) :)

Back again after a long while and a bit of cursing the car, but finally got the head  gasket done and all seems well again. Thanks everyone especially johnnyroper who advised me with everything

Just serviced her, changed and flushed fluids etc and after going for a spin to get her up to temp for flushing the coolant, a  loud whoosh/loss of air started to happen under load/acceleration.

Is there any obvious places to check?

I noticed when i had the egr off that the push rod valve (not the butterfly one) was completely blocked and the vac didnt work opening and closing it. I cleaned it totally so it could open and close when pressed in and out, (but not by vacuum).

I made a video but you cant really hear the loud air whoosh strangely. I might make one whilst driving as it was easier to hear, thats if need be.

THanks in advance again.  :) :)
« Last Edit: September 16, 2016, 03:15:17 PM by egg »
As you slide down the banister of life, may the splinters never face the wrong way.

Offline insanitybeard

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Re: Loud whoosh/Air escaping under load.
« Reply #1 on: September 16, 2016, 03:26:07 PM »
Most likely culprit is a popped off or burst intercooler hose. I would look under the bonnet and get somebody to give the engine a rev whilst you try to find the source of the noise, if you can't find anything amiss up top then you may need to pull the engine undertray off (if fitted) and do the same again.
Always learning..... Often by mistakes!

Offline johnnyroper

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Re: Loud whoosh/Air escaping under load.
« Reply #2 on: September 16, 2016, 04:42:33 PM »
With the work you have done I would be looking at the hose in to EGR housing in case you missed the slot with Spring clip and if that's ok the outlet on turbo as they are prob only ones you disturbed.


Nice one with getting the head all done,has the pressurising stopped now?

Offline johnnyroper

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Re: Loud whoosh/Air escaping under load.
« Reply #3 on: September 16, 2016, 04:50:54 PM »
Also by sounds of it the EGR valve was sticking from carbon build up and now it's clean it does not operate by vac?? If that's the case it's no big deal you have basically got an EGR delete without the blanking plate.

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #4 on: September 16, 2016, 04:54:03 PM »
The pressurizing has just started again :(

It was all fine, and now its doing it again.

I checked head with feeler gauge, no warps. I cleaned everything totally, everything was fine...

Its only a tiny tiny bit of pressure, the return hose is sprinkling out coolant again, i believe thats the early sign yeah?
I havent been for a spin yet to see does it pressurize or not. It was not feeding back to the expansion tank before the coolant change.


Am i jumping the gun?





« Last Edit: September 16, 2016, 05:01:40 PM by egg »
As you slide down the banister of life, may the splinters never face the wrong way.

Offline johnnyroper

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Re: Loud whoosh/Air escaping under load.
« Reply #5 on: September 16, 2016, 06:17:27 PM »
Don't be disheartened just yet mine did exactly the same due to air locks in cooling system after being drained down.
Re check the restrictor in the bleed pipe as mine got a bit of crap stuck on end post repairs which caused air to not vent.

If all ok get it nice and hot on a run,release pressure a few times and re top up.

When you say a bit of pressure how much we talking,just a bit released or is it bubbling like mad when turning cap/holding pressure overnight?

It's normal to have some pressure in the system it's designed to do that to raise the boiling point.

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #6 on: September 16, 2016, 06:34:00 PM »
Its just a bit of pressure, ive had it up to temp and the thermostat has opened. There is only a tiny bit of pressure.

When i rev the engine up to 2000rpm a steady stream of coolant runs out of the air bleed pipe so the restricter definitely isnt blocked. Is this supposed to happen?

The air whoosh seems to be coming from the egr pipework, somewhere behind the turbo air feed downpipe. I used, stainless steel gaskets on these joints, were these correct? Or do i need the compression type ones. I got them from the dealers, so i just assumed they supplied the right ones.

Im trying to be positive. Surely deserve a bit of a luck after me efforts  ::)

As you slide down the banister of life, may the splinters never face the wrong way.

Offline johnnyroper

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Re: Loud whoosh/Air escaping under load.
« Reply #7 on: September 16, 2016, 07:08:59 PM »
Yes it is supposed to send coolant back to bottle. Tiny bit of pressure is totally normal,if head is still leaking it will be a lot of pressure and if ran up to temp and left overnight there would still be pressure in morning. From what you describe it sounds normal,should just get a little hiss briefly when releasing cap.

The noise would not be from EGR pipe work that would be exhaust blow sound and be noticeable at idle. Yes stainless gaskets are correct for those pipes.

I would say the boost pipe off turbo housing has come off or is loose,from memory when I did mine it was a bit of a pain to get it on and done up? Looking at the pipe from the meatal pipe below crank pulley where it meets the turbo.

Yes mate you are right you need a bit of luck after the journey you have had with that engine.

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #8 on: September 17, 2016, 01:18:21 PM »
All good then if its only supposed to be a little pressure.

Thanks for the reassurance johnnyroper  8-)
I found the boost leak, and you were bang on. It was the pipe that connects the turbo outlet to the steel pipe which runs alongside the sump under the crank pulley. I had to remove the drive shaft again to get at it, but all is well.

Sorry to be a pain but i have another problem, well it may be just minor. When test driving the car on a very short trip, there is smoke coming from somewhere in the engine bay, around the back i think. I gently brought the car up to temp so as to allow the thermostat to open before i drove, and there was no smoke at all. It seems to happen only after being driven. The smoke is making its way into the cab as well.

Could it be oil residue somewhere burning? Only getting at that area again is very awkward, as ye well know.

 ;D
As you slide down the banister of life, may the splinters never face the wrong way.

Offline insanitybeard

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Re: Loud whoosh/Air escaping under load.
« Reply #9 on: September 17, 2016, 01:28:08 PM »
Could be residual oil burning off as you say, it's always gonna happen a bit after a rebuild. Might just be worth checking the turbo oil feed/ return pipes are all sound and not leaking, as well as the EGR cooler pipework- is the smell burning oil or exhaust gas?
Always learning..... Often by mistakes!

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #10 on: September 17, 2016, 01:36:30 PM »
Smells like oil burning. Not exhaust. I had a look this morning when i had the drive shaft off. There was a little drip of oil here or there, but nothing major.

Trouble is, to get it to smoke ill have to drive it, and then by the time i strip it to see where it's coming from it would have stopped.

Would you think it is the turbo? I would have thought if it was the exhaust, then it would smoke before being driven also?

Gonna have another wee spin to see, and i'll get back.
As you slide down the banister of life, may the splinters never face the wrong way.

Offline johnnyroper

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Re: Loud whoosh/Air escaping under load.
« Reply #11 on: September 17, 2016, 03:57:01 PM »
Check rocker cover mine was leaking post head job I tried another new gasket still the same. Turned out the cover was warped and not pulling down on cylinder head at rear,after getting nice and warm the oil had worked down to manifold. After looking in to gaskets/covers etc I found out VW don't supply gasket alone it comes with the cover.
I managed to get a good used one off fleabay and banged it on with a smear of megablack and all was well.
Very difficult to locate the leak though but running fingers over the joint inlet side I discovered it,wiped away but it returned.

That boost hose is a bit of a pig to get back on with shaft in way,least all sorted now.

Offline alial

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Re: Loud whoosh/Air escaping under load.
« Reply #12 on: September 17, 2016, 07:37:39 PM »
hi.. if the aux secondary water pump that keeps working after engine switched off is faulty ..car might has bit of extra pressure ... i repaired mine last week,when it was not working.. coolant bottle had extra pressure ..now it seem fine and get back to normal pressure... check that wee water pump it might not working.. 

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #13 on: September 18, 2016, 10:49:22 AM »
Check rocker cover mine was leaking post head job I tried another new gasket still the same. Turned out the cover was warped and not pulling down on cylinder head at rear,after getting nice and warm the oil had worked down to manifold. After looking in to gaskets/covers etc I found out VW don't supply gasket alone it comes with the cover.
I managed to get a good used one off fleabay and banged it on with a smear of megablack and all was well.
Very difficult to locate the leak though but running fingers over the joint inlet side I discovered it,wiped away but it returned.

That boost hose is a bit of a pig to get back on with shaft in way,least all sorted now.

Yep the rocker cover is warped on mine too, but at the front left hand corner. Stupidly i tried to add a little more torque :-[ and snapped off the bolt in the head. I used 2 drill bits trying to pilot a hole in the bolt to use an easy out, but no joy. Seems the bolts are very hard metal, so am now waiting for a reverse drill bit to try and get a bite and spin it out

I just assumed that the covers from the dealers are going to be extortionate, and wound the bolt into the head more so i could grip with a temporary bolt. There was no leak however from there, but seeing as the cover is warped here, the cover could be warped at the back.

I took the car for a short spin yesterday, and the smoke didnt seem too bad, so now i'm going to do the same in a few mins and see what happens.
Hopefully it was just residue left after the change.

I just want a car that i can fit my 3 kids in without squeezing them in like sardines. When i have the dog in the boot along with the pushchair etc, we're like the Beverly hillbillies.  :)
As you slide down the banister of life, may the splinters never face the wrong way.

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #14 on: September 18, 2016, 10:51:49 AM »
Sorry double post
« Last Edit: September 18, 2016, 10:52:45 AM by egg »
As you slide down the banister of life, may the splinters never face the wrong way.

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #15 on: September 18, 2016, 10:57:45 AM »
hi.. if the aux secondary water pump that keeps working after engine switched off is faulty ..car might has bit of extra pressure ... i repaired mine last week,when it was not working.. coolant bottle had extra pressure ..now it seem fine and get back to normal pressure... check that wee water pump it might not working..

Cheers for the help. That was one of my first things to check though in the hope the head gasket wasn't failing, after advice form other forum members. I fixed it, but made no difference. It was a pig to do though, bit of perseverance wen't a long way.   ;)
As you slide down the banister of life, may the splinters never face the wrong way.

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #16 on: September 19, 2016, 08:31:12 PM »
Just been for a long spin, no more smoke no more pressure.

Fingers crossed thats it for a while, well apart from the discs and pads i'll be doing next week, and front and back sensors ill be fitting.

So glad i joined this forum, extremely nice members and very good advice which really helped me no end, so thanks to everyone.  [THANKS] [THANKS] [THANKS] [THANKS]

As you slide down the banister of life, may the splinters never face the wrong way.

Offline Chrispb

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Re: Loud whoosh/Air escaping under load.
« Reply #17 on: September 20, 2016, 06:11:53 PM »
 [GJ]
2009 Kia Sedona GS In Black 2.9CRDI 183PS. 5 Speed Manual WAV.
2003 MK2 Galaxy Ghia In Solid Black 1.9 TDI 115PS. 5 Speed Automatic.

Upgraded Eberspächer booster heater  to independent heating with 7 day timer.

With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me.
All for a pint of Strongbow.

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Offline Vitor

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Re: Loud whoosh/Air escaping under load.
« Reply #18 on: September 20, 2016, 09:12:07 PM »
Has the whoosh stopped?

My Sharan 2.0 TDI is doing the same... it looks like the sound is coming sonewhere under the drivers feet

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #19 on: September 24, 2016, 09:56:21 AM »
Yeah it was the pipe just loosened. The jubilee clip must have been at an angle and didn't tighten right.
Still all fine. Other jobs planned though. Have a few more issues regarding brakes suspension and vacuum circuit replacement.
As you slide down the banister of life, may the splinters never face the wrong way.

Offline suffolkadam

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Re: Loud whoosh/Air escaping under load.
« Reply #20 on: September 26, 2016, 01:00:31 AM »
hi egg  ,ive got the full ford edis online workshop manual, if you need any thing let me know. damn sight easier than the haynes book. all black and white cad drawings not photographs. just done my head as well and boy have i got some cuts and scratches on my hands! but all seems good at mo

Offline egg

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Re: Loud whoosh/Air escaping under load.
« Reply #21 on: September 27, 2016, 10:48:26 PM »
Very kind of you. To be honest the haynes manual is hard to follow, and without all the help and photos from yourself and other members, i would have had a lot of headaches along with the skinned knuckles.

Glad you got the job done and all is good.

I keep finding other things that need doing now, but at least we're all comfy now :) even the dogs happy with the boot.
As you slide down the banister of life, may the splinters never face the wrong way.

 

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